Normal Conditions

The following conditions are considered normal and are not indications that the brake master cylinder is in need of service.

^ During normal operation of the brake master cylinder, the fluid level in the brake Master Cylinder Reservoir will rise during brake application and fall during release. The net fluid level (after brake application and release) will remain unchanged.
^ Low fluid level without signs of leakage. This condition is caused by displacement of fluid from the brake master cylinder reservoir into the disc brake calipers to compensate for normal brake wear. Add fluid as needed. If very low, check for worn brake pads or shoes.
^ A trace of brake fluid existing on the booster shell below the master cylinder mounting flange is normal. This results from the normal lubricating action of the master cylinder bore end seal.
^ A trace of brake fluid found on the outside of the power brake booster below the brake master cylinder mounting flange. This condition results from the lubricating action of the master cylinder wiping seal.
^ A momentary or slight squirt of brake fluid from the brake master cylinder reservoir upon application of the brake pedal. This condition is caused by fluid displacement through the brake master cylinder reservoir compensating port as the brake master cylinder pistons move forward in the bore when the brakes are applied.
^ A Slight turbulence in the brake master cylinder reservoir fluid when the brake pedal is released. Turbulence occurs as brake fluid returns to the brake master cylinder after releasing the brakes.
^ New brake systems are not designed to produce as hard a pedal effort as in the past. Complaints of light pedal efforts should be compared to pedal efforts on another vehicle of the same model and year.